Dynamo-electric machine.



. Electric Machines, of

specification.

uivrrnn s'rA'rns rATEN OFFICE.

KARL SULZBERGER, OF OHARLOTTENBIIRG, GERMANY, ASSIGNOR T'O GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

l DYNAMO-ELEGTRIC JMAGHINE.

Application filed. April 8,1905. Serial no. 254,461.

To all whom it may concern:

Be it known that I, KARL SULZBERGER, a citizen of Switzerland, residing at Charlottenburg, Germany, have invented certain new and useful Improvements in Dynamowhich the following is a I My present invention relates to the construction of dynamo-electric machines, and more especially to the construction of the rotating members of dynamo electric machines.

One object of my invention is the production of a construction in which formed coils may be'positively butremovably se.

' f'cured to the rotating member even when theopposite turns of coils are separated by "many degrees of arc. Anothorobject obtained with my construction in some cases is the production of a rotating member having distributed windings and definitapolar properties. This object of my invention I may obtain, while at the same time I. produce a rotating member having a smooth external surface.

The embodiment of my invention which I have hereinafter described and illustrated also possesses many -v advantageous features of construction, which are pointed out with particularity in the claims annexed to and forming a part of this specification. Fora better understanding of my invention reference may be had to the accompanying description and drawings in which I have illustrated and described embodlments ofmy invention.

Of the drawings, Figure 1 is. an elevation with parts broken away and III'SGCtlOD on the line 1 1 of Fig. 2 showing a rotating member of -a dynamo-electric machine embodying my invention; Fig.- 2 is an end elevation of the construction shown in Fig. 1 with parts broken away and in section Fig. 3 is a partial-plan showing a modified construction;

and Fig. 4 is a partial elevation showing another m'odlfication.

In the particular embodiment of my in vention which I have shownin the drawings,

integral polarprojeetions 1 represents the shaft carrying the rotating two-pole field magnet of a dynamo-electric machine. The core "proper 2 of the fieldmagnet may be regarded as cylindrical in form with two similar.diametrfically-opposed The core 2 and. polar-projections 3 may be solid and integral Specification of Letters Patent.

with the shaft 1, as shown, orform'ed of laiiii nated iron in acoordancewith the "conditions: under which the machine is to be used. The outer surface of the core between th'e 'polar projections has formed'in it a series of undercut grooves 4 which extend parallel to the axis of the shaft 1.

The windings for the field magnet com prise two similar sets of conductors in the form of three loops or coils 5, 6 and 7, one set surrounding each polar projection. The coils 5, 6 and 7 are secured in place by two diametrically opposed. coil -or conductor holders 8 and four similar. sets of coil or con ductor holders 9. The coil holders or cone ductor-securing devices are provided with tenons or projections which. enter the a propriate undercut grooves or slots 4. Tfie holders 8 are located-midway between the polar projections 3, and one set of holders 9 is located between each polar projection 3 and each support 8.

In the construction illustrated in Figs. 1 andfZ of the drawin one piece, while eacli coil holder 9 is formed in two parts or halves 10 and 11, the parts being separated by a substantially radial plane. The part 10 of each coil holder 9 is in the form of a bar the length of the polar projections and core body 2 proper. Each part 11, however, is divided into a number of short blocks or portions 12.

In assembling the field magnet after the windings are placed about the polar portions 3, the left-hand parts 10 of the coil support 9 are inserted radially in the proper undercut rooves 4-. blocks 12 time. tance between the right-hand end of the s each coil holder 8 is in After this occurs the short are inserted into place one at a As clearly shown in F 1g. 1 the discorebody 2 proper and the inner surface of blocks 12, one at a time, in the proper undermoved longitudinally into place in the proper loo, cut grooves or slots, after which they may be undercut groove'or slot formed by two walls of caches-lot 4 and one side of the part '10. ,lith the construction described the windings are secured rigidlv and firmly inpla'ce witho ,ut injury to the insulation ofthe'coil in any inaniier, and without distortion of the coils. The coil holders. S wh1ch are ,each similar to the coil holders 9, but, are formed in one part each, may be moved axially into place after the windings are in position.

be formed of magnetic material and in other cases part ofthe coil holders may be made of rnagnetic materials while others are made of non-magnetic mater al. In .many cases in the construction offield magnets 1 make the coil holders 8 of non-magnetic material such aslphosphor bronze, and make all of the coil ho ders 9 of magnetic material. When parts of the coil holders 9 are-made of non-n1ag-' netic material it will be understood that the non-magnetic parts are located adjacent to coil holders. 8. This arrangement insures that the-field magnet shall have sharply defined polar properties. In some cases one partor half of one or more of the holders 9 may. be formed of non-ma netic material, whilethe other halves are iormecLof magnetic material.-

In the construction shown in Fig. 1, the end portions of the windings rest on a supporting surface 13, carried by the shaft 1, which may be the outer surface of an extension' of the core body proper, in which case the ends of the grooves 4 are filled by wedges or blocks 14. The ends of the windings may be firmly secured against the support by a layer of .wire 13, If desired, blocks or wedges may be inserted in the spaces at the bends of the coils or parts of the distributed windings and between the ends of the polar projections and the windings. It will, of course, be understood that the conductors are surrounded by suitable insulating mate rial. Each set of coils may be taped together as shown at 15 in Fig. 1. A collar member 16 carried by the extension or support which may be shrunk on a reduced extension of the core body, is. provided with a flange portion 16 which extends over the ends of the windings to the end of the core body 2 proper. The'flange 16 serves as a protecting shield or cover for the ends 01 the windings. Suitable connections 17 are established between the windings and collector rings 18 mounted on the shaft.

In the construction shown in Fig. 3-tlie coil supports 9", similarly placed to the coil supports 9 of the construction shown in Figs. 1 and 2, are not split into two parts along a radial plane but the whole coil support is divided into a number 'of short blocks 12 which'may be inserted in the same manner." as are the blocks 12 of the COIlStIllCtlOIi width. of the blocks 12.

shown in Figs. 1 and .2. As shown in Fig. 3 only one end of the windings need extend beyond the core, a distance greater than. the A similar arraitgw nient may be made with respect. .to construction shown in Figs. 1 and 2. In some cases channels 19 may be formed between the two halves of the supports 9 into which expanding wedges 20 may be forced to spread the coil holder parts firmly against the adjacent windings and'the walls of the slots into which the inner ends of the coil supports are dovetailed.

Instead of havin the spaces formed between adjaccnt coiI supports and the core body of the exact shape of the winding as in the construction shown in Figs. 1 and 2, the )assages may be made larger and of different shape than the windings as shown in Fig. 4,

in which case wedges 21 are driven into the spaces left to lock the whole firmly together.

It will be obvious to all those skilled in the art that changes may be made in the form of my invention without departing from its spirit, and I do not wish the claims hereinafter made to be limited to the particular construction shown more than is made necessary by the state of the art.

What I claim as new and desire to secure by Letters Patent of theUnited States, is,

1. In combination, a core comprising a body portion and integral projecti'c'ins extending therefrom, and conductor holders secured to said body portion and combining with the integral projections to form a substantially cylindrical member, some of said coil holders being formed of magnetic mate rial, and others of non-magnetic material,

said cylinder member having conductor-rc-- c'eivin recesses formed therein.

2. In combination, a core comprising a body portion, polar projections extending therefrom, and conductor holders secured to said body portion and combining with the body and polar projections to form a substantially cylindrical member, some of said coil holders benrg formed of magnetic mate-' rial and others of non-magnetic material, said polar projections and said conductor holders having conductor-receivin recesses.

3. ,In combination, a cy indrical core having axially extending undercut rooves formed in its surface, a formed coil or sa d core, proportioned so that a space extends between one end of the core and the inner surface of one end of said coil, and coil holders, one entering each of said grooves, each of said coil holders being divided longitudinally in two parts, one of said parts extending throughout the length of the c'oll holders and being inserted radially in the corres 0ndin'g) groove and the other of said parts emg su -di'vided into short bloeks whichare passed one at, a time radially into said space ing formedwith axially-extending undercut winding, ,a plurality. of windingholders arranged between the parts of the distributed winding, some of said holders being formed of magnetic'material; and others-of non-ma netic material.

5:111 combination, a rotating Kidd inagnet, comprising a cylindrical body portion with polar projections, said body portion begrooves or slots located about its periphery,

a winding surrounding eachpolar projection,

and a plurality of-co1l holders formed withtenons each dovetailed into said slots, some of said holders being formed of magnetic material and others of said holders being formed of non-inagnetic material.

' ,6i'1n combination, a field magnet, cornprisingf a body portion, polar projections eX- tendi Y theferom,' and 'coil' holders dove.

tailedinto saidibody ortion-and shaped-so that the'ex'ternal sur aces ofthe polar proa jection and the coil holders unite to form asubstantially'cylindrical body, some of said coil holdersbeing formed of; magnetic material and others of'non-magnetic material.

7'. In a rotating field magnet, a body por tion, polar projections extending therefrom; coilholders secured to said body portion and combining with the polarpro'ections to form a-substantially cylindrical ody,- some ,of said coil holders bein' --formed of magnetic material and others o non-magneticmateri'alL In witness whereof, I have hereunto set my hand this 23-d day of March, 1905.

KARL -,'SIHJZBERGEB Witnesses:

I MAX HAMBURGER',

J uLIUe RUMLAND. 

